Carbureter.



No. 794,951. PATBNTBD JLY 18, 1905.l A. B. SGHAAF & V. B. LACY.

CARBURETER.

APPLIoATIoN FILED MAY '1, 1904.

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' UNITED STATES Patented July 18, 1905.

PATENT OEEICE.

ALBERT E. SOHAAF AND VOLNEY E. LACY, OF TOLEDO, OHIO.

CARBURETER.

SPECIFICATION forming part of Letters Patent No. 794,951, dated July 18, 1905.

Application filed May '7, 1904. Serial No. 206,863.

T0 all whom, it may concern:

Be it known that we, ALBERT E. SCHAAE and VOLNEY E. LACY, citizens of the United States, residing in the city of Toledo, in the State of Ohio, have invented certain new and useful Improvements in Oarbureters, of wehich the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

In the operation of carbureters such as are commonly employed with internal-combustion engines for the formation of the gaseous mixture which constitutes the charge an existing difculty lies in the inability'to maintain the due and proper proportion between the volume of air and the quantity of gasolene under different conditions of operation. Thus in running at slow speed or in starting from a condition of rest with the ordinary carbureter the volume of air supplied for mixture with the gasolene or other vapor is usually in excess of that required for the best results, or when the engine isl running at high speed the relative volume of air is less than it should lt is therefore thcl object of the present invention to provide a simple and easily-controlled means whereby the volume of air to be mixed with the gasolene or other vapor shall be regulated according to the requirements of the condition under which the engine is operated, so that the quality of the mixture shall be suited always to such varying requirements.

The invention will be more fully explained hereinafter with reference to the accompanying drawings, in which, for the purpose of illustration and explanation of the nature of the invention, it is represented as embodied in a convenient and practical form, and in which Figure 1 is a transverse sectional view of the carbureter which embodies the invention, the plane of section being indicated by the line 1 1 of Fig. 2; and Fig. 2 is a longitudinal sectional view thereof, the plane of section being indicated by the line 2 2 of Fig. 1.

The admission of the gasolene or other liquid employed as the basis of the charge may be regulated by a suitable float-valve, such as that represented in Fig. 1, wherein a chamber a receives the gasolene from the source of supply through a needle-valve Z, the needle c of which is suitably weighted, as represented, and is supported by the levers d, upon which rests a float e. By this device the height of the gasolene in the chamber a is maintained without appreciable variation, since any increase immediately raises the oat e, thereby permitting the valve-needle c to descend and close the valve-port, while any decrease causes the valve-needle to rise and open the port wider, the iioat and the outer arms of the levers slightly overbalancing the weight of the needle and its stem. From the chamber a the gasolene flows through a suitable channel to a hollow adjustable plug or nozzle f, which is provided at its upper end with a port f for coperation with a valve-needle g and preferably with a recess f2 in its upper end to retain the gasolene admitted through the port f for vaporization by the current of air which passes over and around the end of the adjustable plug f. The last-named needlevalve is preferably located in a sleeve or thimble 7L, placed centrally with respect to the airinlet e', this adjustable plug, needle-valve, and sleeve or thimble forming an aspirator and vaporizer,

The shell or casing 7c, which receives and supports the several parts of the carbureter, as herein described, and is provided'with the air-inlet v1 and with an outlet Z, which communicates with the engine, is so formed, preferably by an enlargement or supplemental shell 7c', as to provide a chamber or passage 702 for air around the aspirator and vaporizer, such chamber or passage communicating with the outlet Z beyond the vaporizer through auxiliary air-ports m', preferably triangular or tapered, as clearly shown in Fig. 2, formed in a sleeve or lining m, which is fixed in the shell is. The sleeve m terminates within an enlargement 7c3 of the shell or casing 7c, so that a free passage for the air and vapor is provided around the end of the sleeve m, all of which must pass through said sleeve m. A guide sleeve or lining n may also be supported by the casing 7c opposite and in line with the sleeve m, but separated therefrom, as clearly shown in Fig. 2. Arranged to move in the sleeves m and n is a'throttle-plunger, comprising a cylindrical portion 0 Within the sleeve m, a second cylindrical portion 0, connected vvith the portion 0 by arms or bridges 02, and a stem 03, lby which the position of the throttle-plunger may be controlled. The end of the portion 0 nearest to the portion 0 of the throttle-plunger is preferably provided with V-shaped notches oA1 for a purpose presently to be described. It will be observed that the thimble 7L of the aspirator and vaporizer is preferably extended Within the sleeve portion 0 of the throttle plunger, so that Whatever air is drawn through the auxiliary air-ports m may assist the action of the aspirator and vaporizer and be thoroughly mixed with the vapor which is delivered by the sleeve or thimble 7i.

In the operation of the device it Will be understood that when the throttle-plunger is moved to the left in Fig. 2 to its limit the auxiliary air-ports m will be closed by the sleeve portion 0, and the V-shaped notches 0i in the sleeve portion o Will be covered by the sleeve m, so that no air and no mixture of air and vapor passes to the outlet Z. As the throttle-plunger is moved to the right, however, the notches 04 are opened rapidly and the auxiliary air-ports m are opened slowly, so that in starting up the engine from a condition of rest not only is the delivery of mixture to the engine restricted, but substantially all of the air which enters into the mixture is that Which passes through the aspirator and vaporizer, the volume of air thus being proportioned to the quantity of gasolene delivered by the needle-valve f g, while as the movement of the throttle-plunger to the right is continued the end of the sleeve portion o' clears the end of the sleeve m, permitting a freer delivery of mixture to the outlet, and the auxiliary airports m are opened farther, permitting an additional volume oi" air to be drawn in to be mingled with the richer mixture of air and vapor delivered through the thimble i. 1n this manner the quantity of auxiliary air is increased until the throttle is opened to its Widest extent, keeping pace with the increasing quantity of gasolene supplied and yaporized by the aspirator and vaporizer, thus securing under all conditions of operation that quality of the mixture Which is most satisfactory. It

Will be understood that the quantity of gasol lene supplied may be regulated at all times by the needle-valve g. It Will be also understood that the form and arrangement of the several parts of the improved carbureter may be varied to meet different conditions of use as may be required Without departing from the spirit of the invention.

We claim as our invention-' 1. A carbureter, comprising a casing having an inlet and an outlet, a thimble located Within said casing and having an air-passage therethrough, means to supply the fluid basis of the charge to said thimble, a sleeve extended from said thimble to said outlet and having auxiliaryair-portstherein,andasleeve like throttle-plunger arranged to slide Within the first-named sleeve and to control said auxiliary air-ports and vary the quantity of air admitted therethrough, substantially as described.

2. A carbureter, comprising a casing having an inlet and an outlet, a thimble located Within said casing and having an air-passage therethrough, means to supply the Huid basis ol the charge to said thimble, a sleeve extended from said thimble to said outlet and having auxiliary air-ports therein, a sleevelike throttle-plunger arranged to slide in the first-named sleeve and to control said auxiliary air-ports and vary the quantity of air admitted therethrough and communicating with the outlet and a second sleeve-like throttleplunger connected with the first throttle-plunger and arranged to slide in the irst-named sleeve to control the outlet, substantially as described. v

3. A carbureter, comprising a casing having an inlet and an outlet, a thimble located in said casing and having an air-passage therethrough, means to supply the fluid basis of the charge to said thimble, a sleeve 'extended from said thimble to said outlet and having triangular air-ports therein, a sleeve-like plunger arranged to slide in the first-named sleeve and to control said triangular air-ports to vary the quantity of air admitted therethrough, a second sleeve-like throttle-plunger arranged to cooperate with the end of the iirst-named sleeve to control the outlet, and arms connecting the second th rottle-plunger to the iirst throttle-plunger, substantially as described.

4:. A carbureter comprising a casing having an inlet and an outlet, a thimble located within said casing and having an air-passage therethrough, means to supply the fluid basis of the charge to said thimble, asleeve in alinement With said thimble and having auxiliary air-ports therein, and a sleeve-like throttleplunger arranged to slide Within the firstnamed sleeve and to control said auxiliary air- V ports and vary the quantity of air` admitted therethrough, substantially as described.

5. A carbureter comprising a casing having an inlet and an outlet, a thimble located Within said casing and having an air-passage therethrough, means to supply the fluid basis TOO IIO

of the charge to said thimble, a sleeve in alinement with said thirnble and having auxiliary air-ports therein, a sleeve-like throttle-plunger arranged to slide in the rst-named sleeve l and to control said auxiliary air-ports and Vary the quantity of air admitted therethrough and also to control the outlet, substantially as described.

This specification signed and witnessed this 2d day of May, A. D. 1904.

ALBERT E. SCHAAF. VOLNEY E. LACY.

In presence of M. WV. BENNETT, R. V. LAW. 

